Tack-pulling machine.



UNITED sTATEs PATENT oEEroE.

JOHN B. HADAWAY, OF SWAMPSCOTT, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW TACK-PULLING MACHINE.

Specication of Letters Patent.

Patented Feb. 6, 1912.

To all whom. t may concern.'

Be it known that I, JOHN B. HADAWAY,

a citizenv of the United States, residing at Swampscott, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Taek- Pulling Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention rela-tes to machines for pulling tacks yfrom lasted shoes.

The .object of theinvention is to improve 15* the construction 'and mode of operation of that class of tack pulling machines in which the tacks are acted upon and extracted by one or more tack pulling blades arranged at the periphery of a rotary tack pulling tool zo'or wheel.

As heretofore constructed, the tack pullingtools or wheels of this type of machine have usually been provided with .peripheral ribs or rims at one or both ends of the blades '25' which form guards against which the work may be ressed in presenting the shoe 1n position For the pulling of the tacksby the blades. These guard rims rotate with the blades, and kby reason of their frictional B0l engagement with the work, tend to continually move the work in the direction of their rotation. This tendency is especially pronounced in case'a tool of this character is employed for pulling Isole tacks which are driven in until their headsare substantially liush with the surface of the sole. I n ex tracting these sole tacks, the sole of the shoe is pressed forcibly against the guard rim vorrims, so that the surface of the sole at 40 thev point where the tack is located intersects or cuts across the path of the blades. By reason ofthe comparatively heavy pressure of the sole against the rapidly rotatlng l'guard rim or rims lat this time, there is an ifincreased tendency for the rims to ymove the Work in the direction of their rotation.

It is necessary, therefore, for the o perit'or not' only to hold the shoe firmly agarzst the.

action of the tack pulling blades so that they ifm vmay act eiicientty to wipe the tack out of relation tothe-rotating blades.

' action of the-rotarfyrin It is one object of the invention to avoid the objectionable action of the guard or guards, so that the tacks may be more read- -ily and accurately positioned with relation to the path of the rotary blades, and with less exertion on the part of the operator.

To this end, one feature of the invention contemplates the provision in a tack pulling machine provided with a rotary tack pulling tool having a tack pulling blade at its periphery, ofla work engaging guard at one or both ends Vof the blade which is so supported that the tack pulling tool may rotate independently of the guard or guards. In accordance with this feature of theinvention in its broader aspects, the work supporting guard may be arranged at one or both ends of the -tack pulling blades, and may be mounted in any suitable manner so that thev will not rotate with the tack pulling blade. vIn the referred .and most eiiicient construction which has been yet devised, the work supporting guard is in the form of a disk having a circular rim, and mounted for independent rotation concentrically with the rotary tack pulling tool. This form of guard enables the shoe` to be easily and conveniently moved while held in enga-gement with the rim, and requires the least eser. tion on the part of the operator, since-fthe rim may be rotated by engagement with-.the sole as the shoe is advanced 4to bring the tacks successively into the path of the rotary blade, thus avoiding the necessity oitsovercoming any resistance due to the friettohal engagement of the guard with the a,...

Another feature of the invention contemplates the provision of an improved forml of tack pulling blade having a chisel edl e for engaging the tack, whereby the bla e may be repeatedly sharpened or repaired when it becomes dull or nicked, without requiring relative adjustment of the blade and work engaging guard. In accordance with this feature of the, invention, each blade of the rotary tack, pulling tool is plpvided with av chisel edge and with 'a peripheral` surface lextending circumferentially to the 'rear of the edge,and formed concentric with the tool. With this construction, the front edge of the blade `may be ound'or cutaway witheut varying the r ation between the edge and the .the tool, and conse- 'sharpened or 'out requir esI ing any' adjustment of the blades in order that their path of travel shall remain the v same with relation to the work supporting guard or guards.` The several features of the invention will be readily understood from an inspection of the accompanying drawings, in which- Figure l is a view showing the spindle of a tack pulling machine embodying the linvention in its preferred form, the tack pulling tool and work supporting guards being shown in section, and Fig. 2 is an end elevation of the spindle with the tool and guards mounted thereon.

In the construction shown, the spindle 1 of the tack pulling machine is provided at its end with a reduced portion 2, and the tack pulling tool 3 is secured at about the center of ythis reduced portion. As shown, the tack pulling tool comprises a `sleeve which is secured to the reduced end of the spindle by a pin 4, and is provided with two diametrically opposed tack pulling blades 5. The tack pulling blades are provided with chisel edges constructedy to pass under the head of a tack and to wipe or pull the-tack out of the sole whenthe head of the tack is brought into the path of the blades.- Each blade is also provided with .Mala peripheral portion 6 which extends circumferentially to the rear of the edge of the blade, and is concentric with the tool. With this construction, the front edge of the blade may be ground or cut away to sharpen the blade, or to remove the nicks formed therein by engagement with the tacks, and this grinding or cutting away of the front edge of the blade will not change the relation of the edge to the axis of the spindle, or effect any change in the path of travel of the blades.

In the construction shown, the machine is provided with two work` engaging guards arranged at opposite ends of the tack pulling blades 5, and so mounted that the tool 3 and the blades may be rapidly rotated while the guards remain stationary, or rotate independently of the tool and blades. In the form shown, these guards consist of two disks 7 `and 8 loosely mounted upon thev reduced end 2 of the spindle, and arranged at opposite ends of the tool 3. The

rims of'the disks lie substantially in or slightly within the plane of travel of the edges of the tack pulling blades. The blades of .the tack pulling tool are preferably so formed that the periphery of the tool or plane of travel of the edges of the blade is substantially frusto-conical, the smaller diameterY of the tool being toward the end of the spindle. l The periphery of the, tool is also bowed 0rcurved outward` somewhat between the endsof the blades, as indicated, since this construction of blade is more ef- 65 cient inpassing beneath the head ofthe tack when it is embedded in the surface of the sole. The frusto-conical construction and arrangement of the tool is also of advantage, since it enables the surface of the sole to be held in a horizontal position and to be moyed transversely of the axis of the tool when bringing the surface of the Isole into the path of the tack pulling blades, and enables the shoe to be tip ed laterally away from the spindle 1 in Bringing the tack into the path of the blades. The sole tacks may thus be brought into proper position to be acted upon by the tack pulling blades underall conditions without danger of interference bythe engagementpf some part of the shoe with the spindle. In utilizing the machine for pulling sole tacks, the sole ofy the shoe will be engaged with the guard 8 by the operator, and will be moved transversely to the axis of the spindle until the tack which is to be pulled is in proper position with relation to the periphery of the rapidly revolving tool. During this movement, the guard 8 rotates about the reduced end of the spindle, and rolls along the surface of the sole, so that the work may'be easily and conveniently moved with little exertion on the partici the operator. When the operator lhas brought the tack into proper positionto he pulled, he tips the shoe on the guard 8, and in ease the tack is driven way in, or has its head embedded in the sole, he continues the tipping movement until the surface of the sole rests -against the guards 7 and 8, and then presses the work against the guards, thus bringing the surface of the sole at the point where the tack is located into position where it intersects the path of travel of the blades 5. At thistime the guards 7 and 8 are stationary, and it is only necessary for the operator to hold the shoe against the action Aof the rotary blades as they operate upon the tack to wipe or pull it out of the sole. When this tack has been extracted, the shoe is tip )ed to bring the surface of the sole out of the path of the tack pulling blades, and then the. shoe is moved by the operator to bring the next tack into position to be extracted, the guard 8 rotating to facilitate the movement of the shoe.

lVhile the machine shown and described is especially designed for use in pulling sole tacks, and its operation has 'been described with reference to such use, it will be understood that it may be used for pulling other tacks. lt'will also be understood that the features of the invention may be embodied in machines especially designed and intended for use in pulling., tacks other than sole tacks, and that the specilic construction t and arangement of the parts may be varied and modified without departing from the invention.-

4 pull tacks,l and a Work supporting 'guardv` .10

imanes Having explained the nature'. and object l of the inventiomand specilcally described` one construction in Which`-itj may be l einbodied, what I claim is lv v1. A tack .pulling machine, having, in

combination, 'a .rotary tool provided with a tack pulling lblade extending crosswise of .its periphery and constructed to engage and combination, a rotary tool provided' with a tack pulling blade constructed to engage and pull tacks, and a vrelatively rotatable work supporting guard arranged at onel end of the tool, substantially as described.

3. A tack pulling machine, having, in combination, a rotary tool provided with a tack pulling blade constructed to engage and pull tacks and a relatively rotatable guard mounted concentrically with and at one end of the tool, substantially as described.

LA tack pulling machine,y having, in combination, a rotary' tool provided with. a tack pullingv blade constructed to engage and ypull tacks, and tvvol relatively rotatable guards mounted concentrically with and at opposite ends of the tool, substantially as described.

5. A tack pulling machine, having, in combination, a frusto 'conical'rota ry tool having a tack pulling blade extending cross- Wise of its periphery and constructed to engage and pull tacks, and a guard at vthe larger end of the tool, substantially as described.

6. A- tack pulling machine, having, in

combination, a frustoconical tool having a tack pulling blade extending crosswise of its periphery and constructed to engage and 1 pull tacks, and Work supporting guard` disks at opposite ends of the tool, substantiallyas described.

7. A tack pulling machine,V having, in combination, a frusto-conical tool having a VAtack pulling blade extending crosswise of its `periphery and constructedto engage and .pull tacks, and relatively .rotatable worksup'porting guard disks at opposite ends of the tool, substantially as described.

8. A' ltack pulling machine, having, in combination, a rotary ,tool having'a tack pulling blade provided with a chisel edge adapted to dig under the head ot a sole tack and a peripheral surface extending circumferentially to the rear of the edge concentric With the axis of the tool, and a Work supporting guard at one end of the tool su stantially'in the plane of 'the path of travel of the edge of the blade, substantially as described.

9. A tack pulling machine, having, in

combination, a tack pulling tool provided with a blade extending crosswise of its peto dig under the head of a sole tack, and a work supporting guard, substantially as de-v scribed.

yriphery and having a convex edge adapted' In testimony whereof I alix my signature,

- Witnesses:

' IRA LFISH,

N. MQPHAIL. 

